diff --git a/dist/README.md b/dist/README.md
index 2a30536ce..ef6a56b41 100644
--- a/dist/README.md
+++ b/dist/README.md
@@ -22,6 +22,8 @@ Remember that you have to update manually also. For some users, updating manuall
 
 ### Firefox webext
 
+Compatible with Firefox 50 and beyond.
+
 - Download `ublock0.webext.xpi` ([latest release desirable](https://github.com/gorhill/uBlock/releases)). 
 - Drag and drop the previously downloaded `ublock0.webext.xpi` into Firefox
 
@@ -31,6 +33,8 @@ When you uninstall the extension, Firefox deletes that file, so all your setting
 
 ### Firefox legacy
 
+Compatible with Firefox 24 to Firefox 56.
+
 - Download `ublock0.firefox.xpi` ([latest release desirable](https://github.com/gorhill/uBlock/releases)). 
 - Drag and drop the previously downloaded `ublock0.firefox.xpi` into Firefox